My ride yesterday took me up the SGRT, which is nothing new. What I saw, however, was new. At least new to my eyeballs.
As I approached this contraption, it appeared to be one large vehicle. But as I passed, I saw that the rear half was just pushing the front half along. Notice the special bumper:
Of course, when I stopped to take pictures, they separated and were all, "I wasn't doing that!"